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1D AEMIP Inversion Using MPA Reparameterization for HTEM Survey at Lamego Gold Mine, Quadrilátero Ferrífero, MG, BrazilNormal access

Authors: M.A. Couto, G. Fiandaca, E. Auken, A.V. Christiansen and J.L. Porsani
Event name: 2nd Conference on Geophysics for Mineral Exploration and Mining
Session: 3D Modelling and Inversion for Mining and Mineral Exploration Methods A
Publication date: 09 September 2018
DOI: 10.3997/2214-4609.201802724
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 745.57Kb )
Price: € 20

Summary:
This paper presents the result of the Airborne Electromagnetic Induced Polarization (AEMIP) 1D inversion using the Maximum Phase Angle (MPA) Cole-Cole model reparameterization for a Helicopter Time Domain (HTEM) survey in Quadrilátero Ferrífero area, MG, Brazil. The inversion was conducted for a set of four soundings points over the mineralized structure of Lamego Gold Mine. The results demonstrate good agreement with the drill-hole lithological description data and indicates two polarizable layers: one thin layer associated with the Au-mineralized banded iron formation (BIF) and the other one associated with a thick graphite schist bellow the Au-mineralization. Additionally, the AEMIP inversion results might suggest improvements in the underground resistivity model, which could not be achieved if the non-complex resistivity model is considered. Keywords: AEMIP, MPA Reparameterization, HTEM, Quadrilátero Ferrífero, Brazil


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